<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 添加按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域  -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @click="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <el-row v-for="(item2) in item1.children" :key="item2.id">
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @click="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @click="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- slot-scope="scope" -->
          <template slot-scope="scope">
            <!-- 修改 -->
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <!-- 删除 -->
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <!-- 分配角色 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树型控件 -->
      <el-tree
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        :data="rightsList"
        :props="treeProps"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>

export default {
  data: function () {
    return {
      rolesList: [],
      // 控制分配权限对话框显示与隐藏
      setRightDialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选择节点id值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created: function () {
    this.getRolesList()
  },
  methods: {
    // 获取所有列表权限
    getRolesList: async function () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.rolesList = res.data
    },
    // 根据id删除
    removeRightById: async function (role, rightid) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该标签, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightid}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      role.children = res.data
    },
    // 分配权限，点击后弹出对话框
    showSetRightDialog: async function (role) {
      this.roleId = role.id

      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
      this.rightsList = res.data
      // 获取三级权限id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys: function (node, arr) {
      // 不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 分配权限对话框关闭后清空  defKeys
    setRightDialogClosed: function () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    allotRights: async function () {
      const key = [
        ...this.$refs.treeRef.getCheckedKeys(),
        this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idstr = key.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idstr })
      if (res.meta.status !== 200) return this.$message.error('分配角色权限失败')
      this.$message.success('分配角色权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-table {
  margin-top: 15px;
}
.el-tag {
  margin: 7px;
}
.el-row {
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
}
.el-row:first-child {
  border-top: 1px solid #eee;
}
.el-col > .el-row {
  border-top: 0;
}
.el-col > .el-row:last-child {
  border-bottom: 0;
}
</style>
